<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                            v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 栅格系统布局-->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                                    v-for="(item2, i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">
                                        {{item2.authName}}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"
                                            closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column label="#" type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit"
                            @click="showEditRoleDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete"
                            @click="removeRoleById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting"
                            @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加角色的对话框 -->
        <el-dialog title="添加角色" :visible.sync="addRoleDialogVisible" width="50%" @close="addRoleDialogClosed">
            <el-form :model="addRoleForm" :rules="addRoleFormRules" ref="addRoleFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="addRole">确 定</el-button>
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色的对话框 -->
        <el-dialog title="修改角色" :visible.sync="editRoleDialogVisible" width="50%" @close="editRoleDialogClosed">
            <el-form :model="editRoleForm" :rules="editRoleFormRules" ref="editRoleFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
                :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
  
<script>
export default {
    name: 'Roles-test',
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightslist: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点Id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: '',
            // 控制添加角色对话框的显示与隐藏
            addRoleDialogVisible: false,
            // 控制修改角色对话框的显示与隐藏
            editRoleDialogVisible: false,
            //添加角色的表单数据
            addRoleForm: {
                roleName: '',
                roleDesc: '',
            },
            addRoleFormRules: {
                //验证角色名是否合法
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 1, max: 10, message: '角色名称必须在 1 到 10 个字符之间', trigger: 'blur' }
                ],
                //验证角色描述是否合法
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                ],
            },
            //查询到的角色信息对象
            editRoleForm: {},
            editRoleFormRules: {
                //验证角色名是否合法
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 1, max: 10, message: '角色名称必须在 1 到 10 个字符之间', trigger: 'blur' }
                ],
                //验证角色描述是否合法
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                ],
            },
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')

            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
            }

            this.rolelist = res.data

            //console.log(this.rolelist)
        },
        // 根据Id删除对应的权限
        async removeRightById(role, rightId) {
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm(
                '此操作将永久删除该文件, 是否继续?',
                '提示',
                {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }
            ).catch(err => err)

            if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除！')
            }

            const { data: res } = await this.$http.delete(
                `roles/${role.id}/rights/${rightId}`
            )

            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败！')
            }

            // this.getRolesList()
            //把服务器返回的最新权限直接赋值给children属性防止整个列表刷新
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')

            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败！')
            }

            // 把获取到的权限数据保存到 data 中
            this.rightslist = res.data
            //console.log(this.rightslist)

            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
        getLeafKeys(node, arr) {
            // 如果当前 node 节点不包含 children 属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }

            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]

            const idStr = keys.join(',')

            const { data: res } = await this.$http.post(
                `roles/${this.roleId}/rights`,
                { rids: idStr }
            )

            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败！')
            }

            this.$message.success('分配权限成功！')
            this.getRolesList()//刷新角色列表
            this.setRightDialogVisible = false
        },

        // 监听添加角色对话框的关闭事件
        addRoleDialogClosed() {
            //关闭对话框则清空表单数据
            this.$refs.addRoleFormRef.resetFields()
        },
        //点击确定按钮，添加新角色
        addRole() {
            this.$refs.addRoleFormRef.validate(async valid => {
                if (!valid) return
                // 可以发起添加角色的网络请求(axios)
                const { data: res } = await this.$http.post('roles/', this.addRoleForm)
                if (res.meta.status !== 201) {
                    this.$message.error('添加角色失败！')
                } else {
                    this.$message.success('添加角色成功！')
                    // 隐藏添加角色的对话框
                    this.addRoleDialogVisible = false
                    // 重新获取角色列表数据
                    this.getRolesList()
                }
            })
        },
        // 监听编辑角色对话框的关闭事件
        editRoleDialogClosed() {
            this.$refs.editRoleFormRef.resetFields()
        },
        //展示编辑角色的对话框
        async showEditRoleDialog(id) {
            //根据id查询角色信息
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询角色信息失败！')
            }
            this.editRoleForm = res.data
            this.editRoleDialogVisible = true
        },
        //修改角色信息并提交
        editRoleInfo() {
            this.$refs.editRoleFormRef.validate(async valid => {
                if (!valid) return
                // 可以发起修改用户的网络请求(axios)
                const { data: res } = await this.$http.put(
                    'roles/' + this.editRoleForm.roleId,
                    {
                        roleName: this.editRoleForm.roleName,
                        roleDesc: this.editRoleForm.roleDesc
                    }
                )
                if (res.meta.status !== 200) {
                    this.$message.error('修改角色失败！')
                } else {
                    // 隐藏修改用户的对话框
                    this.editRoleDialogVisible = false
                    // 重新获取用户列表数据
                    this.getRolesList()
                    //提示修改成功
                    this.$message.success('更新角色信息成功！！！')
                }
            })
        },
        //根据id删除对应的角色信息
        async removeRoleById(id) {
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            //如果用户确认了删除，则返回值为字符串 confirm
            //如果用户取消了删除，则返回值为字符串 cancel
            if (confirmResult !== 'confirm') {
                return this.$message.info('用户已取消删除')
            } else {
                const { data: res } = await this.$http.delete('roles/' + id)
                if (res.meta.status !== 200) {
                    this.$message.error('用户删除失败')
                } else {
                    this.$message.success('用户删除成功')
                    this.getRolesList()
                }
            }
        },
    }
}
</script>
  
<style lang="less" scoped>
.el-tag {
    margin: 7px;
}

.bdtop {
    border-top: 1px solid #eee;
}

.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;//纵向居中对齐
}
</style>
  